ppc-macosx-regs.c   [plain text]

/* Mac OS X support for GDB, the GNU debugger.
   Copyright 1997, 1998, 1999, 2000, 2001, 2002
   Free Software Foundation, Inc.

   Contributed by Apple Computer, Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include "ppc-macosx-regs.h"
#include "ppc-macosx-regnums.h"

#include "defs.h"
#include "frame.h"
#include "inferior.h"
#include "symtab.h"
#include "target.h"
#include "gdbcore.h"
#include "symfile.h"
#include "objfiles.h"
#include "regcache.h"

#include "ppc-macosx-regs.h"

static inline void
supply_unsigned_int (int regnum, unsigned int val)
{
  gdb_byte buf[8] = { 0 };
  store_unsigned_integer (buf + 4, 4, val);
  if (register_size (current_gdbarch, regnum) == 4)
    regcache_raw_supply (current_regcache, regnum, buf + 4);
  else if (register_size (current_gdbarch, regnum) == 8)
    regcache_raw_supply (current_regcache, regnum, buf);
  else
    internal_error (__FILE__, __LINE__, "unknown size for register");
}

/* Some registers may be 32 bits wide, but our internal data structures
   for the register values may be 64 bits. This function assumes that the
   byte order of the unsigned integer that is pointed to by UINT32_PTR is
   already in the correct byte order and that the target 64 bit value is
   big endian.  */
static inline void
regcache_raw_supply_uint32_raw (int regnum, unsigned int *uint32_ptr)
{
  gdb_byte *uint32_bytes = (gdb_byte *)uint32_ptr;
  
  if (register_size (current_gdbarch, regnum) == 4)
    regcache_raw_supply (current_regcache, regnum, uint32_bytes);
  else if (register_size (current_gdbarch, regnum) == 8)
    {
      gdb_byte buf[8] = { 0, 0, 0, 0, 
			  uint32_bytes[0], 
			  uint32_bytes[1], 
			  uint32_bytes[2], 
			  uint32_bytes[3]};
      regcache_raw_supply (current_regcache, regnum, buf);
    }
  else
    internal_error (__FILE__, __LINE__, "unknown size for register");
}


static inline void
collect_unsigned_int (int regnum, unsigned int *addr)
{
  gdb_byte buf[8];
  regcache_raw_collect (current_regcache, regnum, buf);
  if (register_size (current_gdbarch, regnum) == 4)
    *addr = extract_unsigned_integer (buf, 4);
  else if (register_size (current_gdbarch, regnum) ==
           8)
    *addr = extract_unsigned_integer (buf + 4, 4);
  else
    internal_error (__FILE__, __LINE__, "unknown size for register");
}

/* Some registers may be 32 bits wide, but our internal data structures
   for the register values may be 64 bits. This function assumes that the
   byte order of the unsigned integer that is pointed to by UINT32_PTR is
   already in the correct byte order and that the target 64 bit value is
   big endian.  */
static inline void
regcache_raw_collect_uint32_raw (int regnum, unsigned int *uint32_ptr)
{
  gdb_byte *uint32_bytes = (gdb_byte *)uint32_ptr;
  
  if (register_size (current_gdbarch, regnum) == 4)
    regcache_raw_collect (current_regcache, regnum, uint32_bytes);
  else if (register_size (current_gdbarch, regnum) == 8)
    {
      gdb_byte buf[8] = { 0 }; 
      regcache_raw_collect (current_regcache, regnum, buf);
      uint32_bytes[0] = buf[4];
      uint32_bytes[1] = buf[5];
      uint32_bytes[2] = buf[6];
      uint32_bytes[3] = buf[7];
    }
  else
    internal_error (__FILE__, __LINE__, "unknown size for register");
}


static inline void
supply_unsigned_int_64 (int regnum, unsigned long long val)
{
  gdb_byte buf[8];
  store_unsigned_integer (buf, 8, val);
  if (register_size (current_gdbarch, regnum) != 8)
    internal_error (__FILE__, __LINE__, "incorrect size for register");
  regcache_raw_supply (current_regcache, regnum, buf);
}

static inline void
collect_unsigned_int_64 (int regnum, unsigned long long *addr)
{
  gdb_byte buf[8];
  regcache_raw_collect (current_regcache, regnum, buf);
  if (register_size (current_gdbarch, regnum) != 8)
    internal_error (__FILE__, __LINE__, "incorrect size for register");
  *addr = extract_unsigned_integer (buf, 8);
}

void
ppc_macosx_fetch_gp_registers (gdb_ppc_thread_state_t *gp_regs)
{
  int i;

  for (i = 0; i < PPC_MACOSX_NUM_GP_REGS; i++)
    {
      supply_unsigned_int (PPC_MACOSX_FIRST_GP_REGNUM + i,
                           gp_regs->gpregs[i]);
    }

  supply_unsigned_int (PPC_MACOSX_PC_REGNUM, gp_regs->srr0);
  supply_unsigned_int (PPC_MACOSX_PS_REGNUM, gp_regs->srr1);
  supply_unsigned_int (PPC_MACOSX_CR_REGNUM, gp_regs->cr);
  supply_unsigned_int (PPC_MACOSX_LR_REGNUM, gp_regs->lr);
  supply_unsigned_int (PPC_MACOSX_CTR_REGNUM, gp_regs->ctr);
  supply_unsigned_int (PPC_MACOSX_XER_REGNUM, gp_regs->xer);
  supply_unsigned_int (PPC_MACOSX_MQ_REGNUM, gp_regs->mq);
  supply_unsigned_int (PPC_MACOSX_VRSAVE_REGNUM, gp_regs->vrsave);
}

void
ppc_macosx_fetch_gp_registers_raw (gdb_ppc_thread_state_t *gp_regs)
{
  int i;

  for (i = 0; i < PPC_MACOSX_NUM_GP_REGS; i++)
    {
      regcache_raw_supply_uint32_raw (PPC_MACOSX_FIRST_GP_REGNUM + i, 
					&gp_regs->gpregs[i]);
    }

  regcache_raw_supply_uint32_raw (PPC_MACOSX_PC_REGNUM, &gp_regs->srr0);
  regcache_raw_supply_uint32_raw (PPC_MACOSX_PS_REGNUM, &gp_regs->srr1);
  regcache_raw_supply_uint32_raw (PPC_MACOSX_CR_REGNUM, &gp_regs->cr);
  regcache_raw_supply_uint32_raw (PPC_MACOSX_LR_REGNUM, &gp_regs->lr);
  regcache_raw_supply_uint32_raw (PPC_MACOSX_CTR_REGNUM, &gp_regs->ctr);
  regcache_raw_supply_uint32_raw (PPC_MACOSX_XER_REGNUM, &gp_regs->xer);
  regcache_raw_supply_uint32_raw (PPC_MACOSX_MQ_REGNUM, &gp_regs->mq);
  regcache_raw_supply_uint32_raw (PPC_MACOSX_VRSAVE_REGNUM, &gp_regs->vrsave);
}

void
ppc_macosx_store_gp_registers (gdb_ppc_thread_state_t *gp_regs)
{
  int i;

  for (i = 0; i < PPC_MACOSX_NUM_GP_REGS; i++)
    {
      collect_unsigned_int (PPC_MACOSX_FIRST_GP_REGNUM + i,
                            &gp_regs->gpregs[i]);
    }

  collect_unsigned_int (PPC_MACOSX_PC_REGNUM, &gp_regs->srr0);
  collect_unsigned_int (PPC_MACOSX_PS_REGNUM, &gp_regs->srr1);
  collect_unsigned_int (PPC_MACOSX_CR_REGNUM, &gp_regs->cr);
  collect_unsigned_int (PPC_MACOSX_LR_REGNUM, &gp_regs->lr);
  collect_unsigned_int (PPC_MACOSX_CTR_REGNUM, &gp_regs->ctr);
  collect_unsigned_int (PPC_MACOSX_XER_REGNUM, &gp_regs->xer);
  collect_unsigned_int (PPC_MACOSX_MQ_REGNUM, &gp_regs->mq);
  collect_unsigned_int (PPC_MACOSX_VRSAVE_REGNUM, &gp_regs->vrsave);
}

void
ppc_macosx_store_gp_registers_raw (gdb_ppc_thread_state_t *gp_regs)
{
  int i;

  for (i = 0; i < PPC_MACOSX_NUM_GP_REGS; i++)
    {
      regcache_raw_collect_uint32_raw (PPC_MACOSX_FIRST_GP_REGNUM + i,
                            &gp_regs->gpregs[i]);
    }

  regcache_raw_collect_uint32_raw (PPC_MACOSX_PC_REGNUM, &gp_regs->srr0);
  regcache_raw_collect_uint32_raw (PPC_MACOSX_PS_REGNUM, &gp_regs->srr1);
  regcache_raw_collect_uint32_raw (PPC_MACOSX_CR_REGNUM, &gp_regs->cr);
  regcache_raw_collect_uint32_raw (PPC_MACOSX_LR_REGNUM, &gp_regs->lr);
  regcache_raw_collect_uint32_raw (PPC_MACOSX_CTR_REGNUM, &gp_regs->ctr);
  regcache_raw_collect_uint32_raw (PPC_MACOSX_XER_REGNUM, &gp_regs->xer);
  regcache_raw_collect_uint32_raw (PPC_MACOSX_MQ_REGNUM, &gp_regs->mq);
  regcache_raw_collect_uint32_raw (PPC_MACOSX_VRSAVE_REGNUM, &gp_regs->vrsave);
}

void
ppc_macosx_fetch_gp_registers_64 (gdb_ppc_thread_state_64_t *gp_regs)
{
  int i;

  for (i = 0; i < PPC_MACOSX_NUM_GP_REGS; i++)
    {
      supply_unsigned_int_64 (PPC_MACOSX_FIRST_GP_REGNUM + i,
                              gp_regs->gpregs[i]);
    }

  supply_unsigned_int_64 (PPC_MACOSX_PC_REGNUM, gp_regs->srr0);
  supply_unsigned_int_64 (PPC_MACOSX_PS_REGNUM, gp_regs->srr1);
  supply_unsigned_int (PPC_MACOSX_CR_REGNUM, gp_regs->cr);
  supply_unsigned_int_64 (PPC_MACOSX_LR_REGNUM, gp_regs->lr);
  supply_unsigned_int_64 (PPC_MACOSX_CTR_REGNUM, gp_regs->ctr);
  supply_unsigned_int_64 (PPC_MACOSX_XER_REGNUM, gp_regs->xer);
  /* The 64 bit register state doesn't provide the MQ register,
     but we go through the motion of setting it anyway.  Otherwise,
     this register will look always invalid, and we will end up
     flushing the registers when we shouldn't.  */
  supply_unsigned_int (PPC_MACOSX_MQ_REGNUM, 0);
  supply_unsigned_int (PPC_MACOSX_VRSAVE_REGNUM, gp_regs->vrsave);
}

void
ppc_macosx_fetch_gp_registers_64_raw (gdb_ppc_thread_state_64_t *gp_regs)
{
  int i;
  unsigned int zero_mq_val = 0;

  for (i = 0; i < PPC_MACOSX_NUM_GP_REGS; i++)
    {
      regcache_raw_supply (current_regcache, PPC_MACOSX_FIRST_GP_REGNUM + i,
                              &gp_regs->gpregs[i]);
    }

  regcache_raw_supply (current_regcache, PPC_MACOSX_PC_REGNUM, &gp_regs->srr0);
  regcache_raw_supply (current_regcache, PPC_MACOSX_PS_REGNUM, &gp_regs->srr1);
  regcache_raw_supply_uint32_raw (PPC_MACOSX_CR_REGNUM, &gp_regs->cr);
  regcache_raw_supply (current_regcache, PPC_MACOSX_LR_REGNUM, &gp_regs->lr);
  regcache_raw_supply (current_regcache, PPC_MACOSX_CTR_REGNUM, &gp_regs->ctr);
  regcache_raw_supply (current_regcache, PPC_MACOSX_XER_REGNUM, &gp_regs->xer);
  /* The 64 bit register state doesn't provide the MQ register,
     but we go through the motion of setting it anyway.  Otherwise,
     this register will look always invalid, and we will end up
     flushing the registers when we shouldn't.  */
  regcache_raw_supply_uint32_raw (PPC_MACOSX_MQ_REGNUM, &zero_mq_val);
  regcache_raw_supply_uint32_raw (PPC_MACOSX_VRSAVE_REGNUM, &gp_regs->vrsave);
}


void
ppc_macosx_store_gp_registers_64 (gdb_ppc_thread_state_64_t *gp_regs)
{
  int i;

  for (i = 0; i < PPC_MACOSX_NUM_GP_REGS; i++)
    {
      collect_unsigned_int_64 (PPC_MACOSX_FIRST_GP_REGNUM + i,
                               &gp_regs->gpregs[i]);
    }

  collect_unsigned_int_64 (PPC_MACOSX_PC_REGNUM, &gp_regs->srr0);
  collect_unsigned_int_64 (PPC_MACOSX_PS_REGNUM, &gp_regs->srr1);
  collect_unsigned_int (PPC_MACOSX_CR_REGNUM, &gp_regs->cr);
  collect_unsigned_int_64 (PPC_MACOSX_LR_REGNUM, &gp_regs->lr);
  collect_unsigned_int_64 (PPC_MACOSX_CTR_REGNUM, &gp_regs->ctr);
  collect_unsigned_int_64 (PPC_MACOSX_XER_REGNUM, &gp_regs->xer);
  /* The 64 bit register state doesn't provide the MQ register. */
  /* collect_unsigned_int (PPC_MACOSX_MQ_REGNUM, &gp_regs->mq); */
  collect_unsigned_int (PPC_MACOSX_VRSAVE_REGNUM, &gp_regs->vrsave);
}

void
ppc_macosx_store_gp_registers_64_raw (gdb_ppc_thread_state_64_t *gp_regs)
{
  int i;

  for (i = 0; i < PPC_MACOSX_NUM_GP_REGS; i++)
    {
      regcache_raw_collect (current_regcache, PPC_MACOSX_FIRST_GP_REGNUM + i,
			    &gp_regs->gpregs[i]);
    }

  regcache_raw_collect (current_regcache, PPC_MACOSX_PC_REGNUM, &gp_regs->srr0);
  regcache_raw_collect (current_regcache, PPC_MACOSX_PS_REGNUM, &gp_regs->srr1);
  regcache_raw_collect_uint32_raw (PPC_MACOSX_CR_REGNUM, &gp_regs->cr);
  regcache_raw_collect (current_regcache, PPC_MACOSX_LR_REGNUM, &gp_regs->lr);
  regcache_raw_collect (current_regcache, PPC_MACOSX_CTR_REGNUM, &gp_regs->ctr);
  regcache_raw_collect (current_regcache, PPC_MACOSX_XER_REGNUM, &gp_regs->xer);
  /* The 64 bit register state doesn't provide the MQ register. */
  /* collect_unsigned_int (PPC_MACOSX_MQ_REGNUM, &gp_regs->mq); */
  regcache_raw_collect_uint32_raw (PPC_MACOSX_VRSAVE_REGNUM, &gp_regs->vrsave);
}

void
ppc_macosx_fetch_fp_registers (gdb_ppc_thread_fpstate_t *fp_regs)
{
  int i;
  unsigned char buf[sizeof (PPC_MACOSX_FP_REGISTER_TYPE)];

  PPC_MACOSX_FP_REGISTER_TYPE *fpr = fp_regs->fpregs;
  for (i = 0; i < PPC_MACOSX_NUM_FP_REGS; i++)
    {
      deprecated_store_floating (buf, sizeof (PPC_MACOSX_FP_REGISTER_TYPE),
                                 fpr[i]);
      regcache_raw_supply (current_regcache, PPC_MACOSX_FIRST_FP_REGNUM + i, buf);
    }
  supply_unsigned_int (PPC_MACOSX_FPSCR_REGNUM, fp_regs->fpscr);
}

void
ppc_macosx_fetch_fp_registers_raw (gdb_ppc_thread_fpstate_t *fp_regs)
{
  int i;
  PPC_MACOSX_FP_REGISTER_TYPE *fpr = fp_regs->fpregs;
  for (i = 0; i < PPC_MACOSX_NUM_FP_REGS; i++)
    regcache_raw_supply (current_regcache, PPC_MACOSX_FIRST_FP_REGNUM + i, 
			 &fpr[i]);

  regcache_raw_supply_uint32_raw (PPC_MACOSX_FPSCR_REGNUM, &fp_regs->fpscr);
}

void
ppc_macosx_store_fp_registers (gdb_ppc_thread_fpstate_t *fp_regs)
{
  int i;
  unsigned char buf[sizeof (PPC_MACOSX_FP_REGISTER_TYPE)];

  PPC_MACOSX_FP_REGISTER_TYPE *fpr = fp_regs->fpregs;
  for (i = 0; i < PPC_MACOSX_NUM_FP_REGS; i++)
    {
      regcache_raw_collect (current_regcache, PPC_MACOSX_FIRST_FP_REGNUM + i, buf);
      fpr[i] =
        deprecated_extract_floating (buf,
                                     sizeof (PPC_MACOSX_FP_REGISTER_TYPE));
    }
  fp_regs->fpscr_pad = 0;
  collect_unsigned_int (PPC_MACOSX_FPSCR_REGNUM, &fp_regs->fpscr);
}

void
ppc_macosx_store_fp_registers_raw (gdb_ppc_thread_fpstate_t *fp_regs)
{
  int i;
  PPC_MACOSX_FP_REGISTER_TYPE *fpr = fp_regs->fpregs;
  for (i = 0; i < PPC_MACOSX_NUM_FP_REGS; i++)
    regcache_raw_collect (current_regcache, PPC_MACOSX_FIRST_FP_REGNUM + i, 
			  &fpr[i]);
	
  fp_regs->fpscr_pad = 0;
  regcache_raw_collect_uint32_raw (PPC_MACOSX_FPSCR_REGNUM, &fp_regs->fpscr);
}

void
ppc_macosx_fetch_vp_registers (gdb_ppc_thread_vpstate_t *vp_regs)
{
  int i, j;
  gdb_byte buf[16];

  for (i = 0; i < PPC_MACOSX_NUM_VP_REGS; i++)
    {
      for (j = 0; j < 4; j++)
        {
          store_unsigned_integer (buf + (j * 4), 4, vp_regs->save_vr[i][j]);
        }
      regcache_raw_supply (current_regcache, PPC_MACOSX_FIRST_VP_REGNUM + i, buf);
    }

  supply_unsigned_int (PPC_MACOSX_VSCR_REGNUM, vp_regs->save_vscr[3]);
  /* supply_unsigned_int (PPC_MACOSX_VRSAVE_REGNUM, vp_regs->save_vrvalid); */
}

void
ppc_macosx_fetch_vp_registers_raw (gdb_ppc_thread_vpstate_t *vp_regs)
{
  int i;
  for (i = 0; i < PPC_MACOSX_NUM_VP_REGS; i++)
    regcache_raw_supply (current_regcache, PPC_MACOSX_FIRST_VP_REGNUM + i, 
			 &vp_regs->save_vr[i]);

  regcache_raw_supply_uint32_raw (PPC_MACOSX_VSCR_REGNUM, 
				  (unsigned int *)&vp_regs->save_vscr[3]);
/* regcache_raw_supply_uint32_raw (PPC_MACOSX_VRSAVE_REGNUM, 
				   &vp_regs->save_vrvalid); */
}

void
ppc_macosx_store_vp_registers (gdb_ppc_thread_vpstate_t *vp_regs)
{
  int i, j;
  gdb_byte buf[16];

  for (i = 0; i < PPC_MACOSX_NUM_VP_REGS; i++)
    {
      regcache_raw_collect (current_regcache, PPC_MACOSX_FIRST_VP_REGNUM + i, buf);
      for (j = 0; j < 4; j++)
        {
          vp_regs->save_vr[i][j] =
            extract_unsigned_integer (buf + (j * 4), 4);
        }
    }
  memset (&vp_regs->save_vscr, 0, sizeof (vp_regs->save_vscr));
  regcache_raw_collect (current_regcache, PPC_MACOSX_VSCR_REGNUM, &vp_regs->save_vscr[3]);
  memset (&vp_regs->save_pad5, 0, sizeof (vp_regs->save_pad5));
  vp_regs->save_vrvalid = 0xffffffff;
  memset (&vp_regs->save_pad6, 0, sizeof (vp_regs->save_pad6));
}

void
ppc_macosx_store_vp_registers_raw (gdb_ppc_thread_vpstate_t *vp_regs)
{
  int i;
  for (i = 0; i < PPC_MACOSX_NUM_VP_REGS; i++)
    {
      regcache_raw_collect (current_regcache, PPC_MACOSX_FIRST_VP_REGNUM + i, 
			    &vp_regs->save_vr[i]);
    }
  memset (&vp_regs->save_vscr, 0, sizeof (vp_regs->save_vscr));
  regcache_raw_collect_uint32_raw (PPC_MACOSX_VSCR_REGNUM, 
				   (unsigned int *)&vp_regs->save_vscr[3]);
  memset (&vp_regs->save_pad5, 0, sizeof (vp_regs->save_pad5));
  vp_regs->save_vrvalid = 0xffffffff;
  memset (&vp_regs->save_pad6, 0, sizeof (vp_regs->save_pad6));
}

/* Convert a dbx stab register number (from `r' declaration) to a gdb
   REGNUM. */

int
ppc_macosx_stab_reg_to_regnum (int num)
{
  int regnum;

  /* These are the ordinary GP & FP registers */

  if (num <= 64)
    {
      regnum = num;
    }
  /* These are the AltiVec registers */
  else if (num >= 77 && num < 109)
    {
      regnum = PPC_MACOSX_FIRST_VP_REGNUM + num - 77;
    }
  /* These are some of the SP registers */
  else
    {
      switch (num)
        {
        case 64:
          regnum = PPC_MACOSX_MQ_REGNUM;
          break;
        case 65:
          regnum = PPC_MACOSX_LR_REGNUM;
          break;
        case 66:
          regnum = PPC_MACOSX_CTR_REGNUM;
          break;
        case 76:
          regnum = PPC_MACOSX_XER_REGNUM;
          break;
        case 109:
          regnum = PPC_MACOSX_VRSAVE_REGNUM;
          break;
        default:
          regnum = num;
          break;
        }
    }
  return regnum;
}